I realize this is probably going to go mostly unanswered, but I'm interested in some input.

Regarding the inbox, would you prefer it traditional style (i.e. how it is now. You see a list of your PMs in the inbox and can view one at a time), or would you prefer it conversation style (like how facebook displays your message history with a person as a single conversation)? Conversation style would sort the inbox by most recently active convo.

If you place BoTW into the Adult timeline, then Ganon actually attacks 4 times: between OoT and WW, during WW, 10,100 years before BoTW and 100 years before BoTW. So the number of times Ganon attacked tells us nothing about the placement. Placing BoTW into any of the timelines automatically gives it the most Ganon attacks.